Performance Tests and Calibration 6
U1253B User’s and Service Guide 157
Adjustment Considerations
To adjust the instrument, you will need a test input cables
and connectors set for receiving the reference signals (for
example, from the Fluke 5520A calibrator or Agilent 33250A
function/arbitrary waveform generator) and a shorting plug.
Adjustments for each function should be performed with the
following considerations (where applicable):
1 Allow the instrument to warm up and stabilize for 5
minutes before performing the adjustments.
2 Ensure that during the adjustment, the low- battery
indicator does not appear. Replace/recharge the battery as
soon as possible to avoid false reading.
3 Consider thermal effects as you connect test leads to the
calibrator and this instrument. It is recommended that
you wait for 1 minute after connecting the test leads
before you begin the calibration.
4 During ambient temperature adjustment, ensure that the
instrument has been turned on for at least 1 hour with
the K- type thermocouple connected between the
instrument and the calibration source.
After each successful adjustment, the secondary display briefly shows
“PASS”. If the calibration fails, the instrument emits a beep, and an error
code is shown momentarily on the secondary display. For a list of
calibration error codes, refer to “Calibration error codes” on page 171. In
the event of a calibration failure, correct the problem and repeat the
procedure.
Never turn off the instrument during calibration. This may delete the
calibration memory for the present function.
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